A peak cut power calculation unit calculates peak cut power transmittable to an overhead wire as power exhibiting monotonic non-increase with respect to a resistance value of the overhead wire between a vehicle and a substation. In addition, a peak cut unit controls electrical charging/discharging of a rechargeable battery with power of a difference between load power and transmission peak cut power when the load power is equal to or more than the peak cut power.
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1. An electrical charging/discharging controller mounted on a vehicle that runs by performing power transmission and reception to and from substation equipment through an overhead wire to control electrical charging/discharging of a power storage device connected to a load capable of generating regenerative electrical power, the electrical charging/discharging controller comprising: a peak cut power calculation unit configured to calculate transmission peak cut power that is power transmittable to the overhead wire, the transmission peak cut power being power exhibiting monotonic non-increase with respect to a resistance value of the overhead wire between the vehicle and the substation equipment; and a peak cut unit configured to charge the power storage device with power of a difference between the regenerative electrical power generated by the load and the transmission peak cut power calculated by the peak cut power calculation unit when the regenerative electrical power is equal to or more than the transmission peak cut power, wherein the peak cut power calculation unit is configured to calculate an electrical current by dividing a voltage difference by a resistance value of the overhead wire, the voltage difference being a difference between a maximum pantograph point voltage at which no regeneration cancelation of the load occurs and a voltage applied to a regenerative resistor of the substation equipment, the resistance value of the overhead wire exhibiting monotonic increase with respect to the distance between the vehicle and the substation equipment, and the peak cut power calculation unit is configured to calculate the transmission peak cut power by multiplying the electrical current by the maximum pantograph point voltage at which no regeneration cancelation of the load occurs.
A charging controller for a vehicle (like a train) using overhead wires manages a rechargeable battery. It calculates a "peak cut power" which is the maximum power the wire can handle *decreasing* as the distance (and resistance) between the vehicle and the power substation increases. When the vehicle generates excess power (regenerative braking), it charges the battery with the difference between the generated power and this calculated peak cut power. The peak cut power is calculated by finding the current (voltage difference divided by wire resistance) and multiplying that by the maximum voltage the vehicle can use without causing problems. The voltage difference is between the max pantograph voltage and the substation's resistor voltage.
2. The electrical charging/discharging controller according to claim 1 , comprising an overhead wire length calculation unit configured to calculate an overhead wire length between the vehicle and the substation equipment based on a position in which the vehicle is located, wherein the peak cut power calculation unit calculates the transmission peak cut power using a monotonically non-increasing function of which the overhead wire length calculated by the overhead wire length calculation unit is an independent variable.
Building on the previous charging controller description, this version includes a unit that calculates the length of the overhead wire between the vehicle and substation based on the vehicle's location. The peak cut power is then determined using a function where the wire length is the main input. This function ensures that the peak cut power *decreases* as the wire length increases. In essence, the controller uses the vehicle's position to estimate the wire length and subsequently limits the amount of regenerative power allowed back to the grid, prioritizing battery charging.
3. The electrical charging/discharging controller according to claim 1 , further comprising a pantograph point voltage measurement unit configured to measure a pantograph point voltage of the vehicle, wherein the peak cut power calculation unit calculates the transmission peak cut power using a monotonically non-increasing function of which the pantograph point voltage measured by the pantograph point voltage measurement unit is an independent variable.
Expanding on the initial charging controller design, this version includes a unit that measures the voltage at the pantograph (where the vehicle connects to the overhead wire). The peak cut power is calculated using a function where the measured pantograph voltage is the main input. The function is designed so the peak cut power *decreases* as the measured pantograph voltage increases. This allows the controller to dynamically adjust the allowed regenerative power based on real-time voltage conditions on the wire.
4. The electrical charging/discharging controller according to claim 1 , further comprising a section acquisition unit configured to acquire a section in which the vehicle is located, wherein the peak cut power calculation unit calculates transmission peak cut power corresponding to an overhead wire resistance value of a point farthest from the substation equipment in the section acquired by the section acquisition unit as transmission peak cut power in the section acquired by the section acquisition unit.
In addition to the base charging controller, this version incorporates a location awareness module that identifies the specific section of the track the vehicle is on. The controller then uses the overhead wire resistance value corresponding to the *farthest* point in that section from the substation to calculate the peak cut power. This guarantees a conservative (lower) peak cut power value for the entire section, preventing overloading the wire even at the section's most distant point.
5. The electrical charging/discharging controller according to claim 1 , wherein the peak cut power calculation unit calculates reception peak cut power that is power receivable from the overhead wire, the reception peak cut power being power exhibiting monotonic non-increase with respect to the resistance value of the overhead wire between the vehicle and the substation equipment, and the peak cut unit discharges power of a difference between required power that is required by the load and the reception peak cut power calculated by the peak cut power calculation unit from the power storage device when the required power is equal to or more than the reception peak cut power.
This charging controller manages both charging and discharging of the battery. It calculates both a transmission "peak cut power" (maximum power the wire can handle for sending power *to* the substation) and a reception "peak cut power" (maximum power the wire can handle for receiving power *from* the substation). When the vehicle needs more power than the reception peak cut power allows, the controller discharges the battery to make up the difference. Like the transmission peak cut power, the reception peak cut power *decreases* as wire resistance increases.
6. An electrical charging/discharging controller mounted on a vehicle that runs by performing power transmission and reception to and from substation equipment through an overhead wire to control electrical charging/discharging of a power storage device connected to a load capable of generating regenerative electrical power, the electrical charging/discharging controller comprising: a peak cut power calculation unit configured to calculate reception peak cut power that is power receivable from the overhead wire, the reception peak cut power being power exhibiting monotonic non-increase with respect to the resistance value of the overhead wire between the vehicle and the substation equipment; and a peak cut unit configured to discharge power of a difference between required power that is required by the load and the reception peak cut power calculated by the peak cut power calculation unit from the power storage device when the required power is equal to or more than the reception peak cut power, wherein the peak cut power calculation unit is configured to calculate an electrical current by dividing a voltage difference by a resistance value of the overhead wire, the voltage difference being a difference between a maximum pantograph point voltage at which no regeneration cancelation of the load occurs and a voltage applied to a regenerative resistor of the substation equipment, the resistance value of the overhead wire exhibiting monotonic increase with respect to the distance between the vehicle and the substation equipment, and the peak cut power calculation unit is configured to calculate the reception peak cut power by multiplying the electrical current by the maximum pantograph point voltage at which no regeneration cancelation of the load occurs.
A charging controller manages battery charging and discharging. It calculates a reception "peak cut power," representing the max power the wire can receive from the substation; this value *decreases* as the resistance (distance) between the vehicle and substation increases. When the vehicle needs more power than the reception peak cut power, the controller discharges the battery. The peak cut power is derived from the current (voltage difference divided by resistance) multiplied by the max voltage the vehicle can use safely. The voltage difference is between the maximum pantograph voltage and the regenerative resistor's voltage at the substation.
7. A charging controlling method using an electrical charging/discharging controller mounted on a vehicle that runs by performing power transmission and reception to and from substation equipment through an overhead wire to control electrical charging/discharging of a power storage device connected to a load capable of generating regenerative electrical power, the charging controlling method comprising: calculating, by a peak cut power calculation unit, an electrical current by dividing a voltage difference by a resistance value of the overhead wire, the voltage difference being a difference between a maximum pantograph point voltage at which no regeneration cancelation of the load occurs and a voltage applied to a regenerative resistor of the substation equipment, the resistance value of the overhead wire exhibiting monotonic increase with respect to the distance between the vehicle and the substation equipment calculating, by the peak cut power calculation unit, transmission peak cut power that is power transmittable to the overhead wire, by multiplying the electrical current by the maximum pantograph point voltage at which no regeneration cancelation of the load occurs, the transmission peak cut power being power exhibiting monotonic non-increase with respect to a resistance value of the overhead wire between the vehicle and the substation equipment; and charging, by a peak cut unit, the power storage device with power of a difference between the regenerative electrical power generated by the load and the transmission peak cut power calculated by the peak cut power calculation unit when the regenerative electrical power is equal to or more than the transmission peak cut power.
A method for controlling battery charging in a vehicle (like a train) with overhead wires involves calculating transmission "peak cut power". First, the method calculates the current (voltage difference divided by wire resistance). The voltage difference is between the maximum pantograph voltage and the regenerative resistor's voltage at the substation. Then, transmission peak cut power, representing the max power the wire can handle sending *to* the substation (and *decreasing* with resistance), is calculated. When the vehicle generates excess power, the battery charges with the difference between the vehicle's power and the peak cut power.
8. A discharging controlling method using an electrical charging/discharging controller mounted on a vehicle that runs by performing power transmission and reception to and from substation equipment through an overhead wire to control electrical charging/discharging of a power storage device connected to a load capable of generating regenerative electrical power, the discharging controlling method comprising: calculating, by a peak cut power calculation unit, an electrical current by dividing a voltage difference by a resistance value of the overhead wire, the voltage difference being a difference between a maximum pantograph point voltage at which no regeneration cancelation of the load occurs and a voltage applied to a regenerative resistor of the substation equipment, the resistance value of the overhead wire exhibiting monotonic increase with respect to the distance between the vehicle and the substation equipment; calculating, by the peak cut power calculation unit, reception peak cut power that is power receivable from the overhead wire, by multiplying the electrical current by the maximum pantograph point voltage at which no regeneration cancelation of the load occurs, the reception peak cut power being power exhibiting monotonic non-increase with respect to the resistance value of the overhead wire between the vehicle and the substation equipment; and discharging, by a peak cut unit, power of a difference between required power that is required by the load and the reception peak cut power calculated by the peak cut power calculation unit from the power storage device when the required power is equal to or more than the reception peak cut power.
A method for controlling battery discharging in a vehicle using overhead wires involves calculating reception "peak cut power". First, calculate the current (voltage difference divided by wire resistance). The voltage difference is between the maximum pantograph voltage and the regenerative resistor's voltage at the substation. Then, reception peak cut power, representing the maximum power the wire can handle receiving *from* the substation (and *decreasing* with resistance), is calculated. When the vehicle needs more power than available from the wire, the battery discharges with the difference between the vehicle's power needs and the calculated peak cut power.
9. A program for causing an electrical charging/discharging controller mounted on a vehicle that runs by performing power transmission and reception to and from substation equipment through an overhead wire to control electrical charging/discharging of a power storage device connected to a load capable of generating regenerative electrical power, stored in a non-transitory computer readable recording medium, to function as: a peak cut power calculation unit configured to calculate transmission peak cut power that is power transmittable to the overhead wire, the transmission peak cut power being power exhibiting monotonic non-increase with respect to a resistance value of the overhead wire between the vehicle and the substation equipment; and a peak cut unit configured to charge the power storage device with power of a difference between the regenerative electrical power generated by the load and the transmission peak cut power calculated by the peak cut power calculation unit when the regenerative electrical power is equal to or more than the transmission peak cut power, wherein the peak cut power calculation unit is configured to calculate an electrical current by dividing a voltage difference by a resistance value of the overhead wire, the voltage difference being a difference between a maximum pantograph point voltage at which no regeneration cancelation of the load occurs and a voltage applied to a regenerative resistor of the substation equipment, the resistance value of the overhead wire exhibiting monotonic increase with respect to the distance between the vehicle and the substation equipment, and the peak cut power calculation unit is configured to calculate the transmission peak cut power by multiplying the electrical current by the maximum pantograph point voltage at which no regeneration cancelation of the load occurs.
This describes a software program controlling battery charging in an electric vehicle with overhead wires. The program calculates "peak cut power," the maximum power the wire can handle going *to* the substation; this value *decreases* with increasing distance/resistance between vehicle and substation. When the vehicle generates excess power (regenerative braking), the battery charges with the difference between the generated power and the calculated peak cut power. The program determines peak cut power by finding the current (voltage difference divided by wire resistance) and multiplying that by the max safe voltage.
10. A program for causing an electrical charging/discharging controller mounted on a vehicle that runs by performing power transmission and reception to and from substation equipment through an overhead wire to control electrical charging/discharging of a power storage device connected to a load capable of generating regenerative electrical power, stored in a non-transitory computer readable recording medium, to function as: a peak cut power calculation unit configured to calculate reception peak cut power that is power receivable from the overhead wire, the reception peak cut power being power exhibiting monotonic non-increase with respect to the resistance value of the overhead wire between the vehicle and the substation equipment; and a peak cut unit configured to discharge power of a difference between required power that is required by the load and the reception peak cut power calculated by the peak cut power calculation unit from the power storage device when the required power is equal to or more than the reception peak cut power, wherein the peak cut power calculation unit is configured to calculate an electrical current by dividing a voltage difference by a resistance value of the overhead wire, the voltage difference being a difference between a maximum pantograph point voltage at which no regeneration cancelation of the load occurs and a voltage applied to a regenerative resistor of the substation equipment, the resistance value of the overhead wire exhibiting monotonic increase with respect to the distance between the vehicle and the substation equipment, and the peak cut power calculation unit is configured to calculate the reception peak cut power by multiplying the electrical current by the maximum pantograph point voltage at which no regeneration cancelation of the load occurs.
This describes a software program controlling battery discharging in an electric vehicle with overhead wires. The program calculates "reception peak cut power," the maximum power the wire can handle coming *from* the substation; this value *decreases* with increasing distance/resistance between vehicle and substation. When the vehicle needs more power than the reception peak cut power, the battery discharges to compensate. The program calculates peak cut power based on current (voltage difference divided by wire resistance) multiplied by the max safe voltage.
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February 1, 2013
July 4, 2017
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